NCERT grade 9 math

Watch and track your favorite playlist.

Curated by: Khan Academy India - English (9 videos)


Currently Playing: Equal angles subtended by chords, chords are equal | Circles | NCERT class 9 | Math | Khan Academy

Theorem: When two chords subtend an equal angle at the center the chords are equal in length. In this video we prove this statement using SAS test of congruency, and we use Manim to show beautiful animation. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/ncert-class-9 Timestamps: 0:00 What is given 0:47 Strategy 1:38 Statements of proof 2:35 Conclusion Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Devashish Phadnis


Tracks in this Playlist